1131402402 has 48 divisors (see below), whose sum is σ = 2654623608. Its totient is φ = 346187520.

The previous prime is 1131402379. The next prime is 1131402409. The reversal of 1131402402 is 2042041311.

1131402402 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 761263281 + 370139121 = 27591^2 + 19239^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1131402409) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28998 + ... + 55710.

Almost surely, 2^1131402402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1131402402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1327311804).

1131402402 is an abundant number, since it is smaller than the sum of its proper divisors (1523221206).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1131402402 is a wasteful number, since it uses less digits than its factorization.

1131402402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26915 (or 26912 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1131402402 is about 33636.3256316739. The cubic root of 1131402402 is about 1042.0111484053.

Adding to 1131402402 its reverse (2042041311), we get a palindrome (3173443713).

The spelling of 1131402402 in words is "one billion, one hundred thirty-one million, four hundred two thousand, four hundred two".